Great product!! Doesn’t increase horsepower, however it will quiet down the motor on that 7.3 and give better mileage and throttle response ! Bit of a pain to put on but works good

What better way to pass the time in Rona Quarantine than to work on the truck? Had a leaking passenger side fuel line on my 2000 and saw this as well so decided it was time to upgrade. Plugs are a little hard to get out of the heads so get the socket as well. Fuel pressure is right at 64psi now, and she really is smoother running, and no knock and cackle. Perfect fit, well made kit.

If you own a 7.3 you haven’t even started to unleash its capabilities if u haven’t installed the FRX as of yet. There is a huge difference in truck without it., it like day and night. It takes away that famous 7.3 crackle that makes us standout. It’s still there in a sense but it’s sounds a lot better. It makes it quieter making the whistle from our turbos a lot more pronounced. Aside from sound the truck on performance end is also distinguished shifts smoothers. Ramping idle is put to rest and it takes off a lot quicker. Do this upgrade if you’re already looking at it, your injectors will love you more and so will the rest of your truck. Pair the FRX with the banjo bolt and cvd upgrades and you’ll pretty much have a brand new motor. RiffRaff is the place I go to get my upgrades and maintenance items they always have good prices, the shipping is always fast, and the service is incomparable. Thanks clay and everybody at RiffRaff for all the efforts and help. You have a lifetime customer here.

Excellent build quality, perfect fitment and now fuel pressure is where it should be. Every 7.3 needs this. Super fast postage to Australia. Thanks

I purchased my early 99' F350 with almost 300k miles. The previous owner had recently done a bunch of big ticket repairs and I'm looking to make this engine better and more reliable than it already is. I installed this with the HPX and notice faster starts, smoother idle and better throttle response. Maybe a design change, but I didn't have to grind away any of the turbo crossover to get it to fit. Great product!

I’ve been a 7.3 Super Duty owner continuously since 1999. I’m on my 4th truck and have spent all kinds of money on all sorts of mods. This is one that delivers. My 02 F 350 w 170K runs noticeably smoother and the hard hitting diesel CLACK is gone. Put me down as very pleased. Even my son, a 7.3 owner who does not hand out complements, noted my truck now runs noticeably smoother. Well done Riffraff!

My truck is over 20 years old and I had no issues removing the square head plugs with a 7mm wrench. The rear, driver's side plug and connection was a little tedious. Excellent product made with excellent materials. The smooth idle and acceleration are amazing!

This is an awesome mod and very well made. Why not upgrade as these 7.3 engines are fuel pressure dependent to operate properly.

Really easy to install and a great overall product.